Shortly after delivery there may be difficulty in emptying the bladder; and, under such circumstances, the doctor or nurse used to catheterize the patient immediately; this habit once begun, it was often necessary to repeat the operation day after day, or, for that matter, several times a day. But as physicians came to know more of the relations of bacteria to inflammation of the bladder, they grew more cautious, and preferred to wait a long time before resorting to the catheter. The reward of this patience was to find that, with remarkably few exceptions, puerperal women ultimately void of their own accord. Accordingly catheterization after child-birth is now postponed, and is never performed until a number of devices to get the patient to void spontaneously have been tried without success. Often urination follows putting a hot-water bottle over the bladder; or pouring warm water over the vulva; or placing the patient upon a bed-pan from which steam is rising. When these and other devices well known to every nurse are not effective, catheterization becomes necessary. With the elaborate precautions taken to avoid infection of the bladder, catheterization is now performed with very slight risk. Constipation, for various reasons, becomes a regular feature of the lying-in period. The confinement in bed, restricted diet, relaxation of the abdominal wall, and sensitiveness about the region of the rectum, all have a tendency to prevent spontaneous movements of the bowels. As one of these influences after another is removed the bowels begin to act naturally. Childbirth may cause chronic constipation, but this sequel would occur much less often if a little care were taken to prevent it. The routine use of enemas deserves to be condemned. I see no objection to an occasional enema if purgative medicine has been taken without effect, but constant use of them, more than likely, will result in the enema habit. Similarly, long-continued administration of strong purgatives tends to make them a permanent necessity. While in bed if medicine is taken every other day the bowels will have opportunity on the intervening days to move spontaneously, though we do not really expect them to move naturally until six or eight weeks after the delivery, when the patient is able to take as much exercise as she likes. Toward the end of the second week, however, mild laxatives generally prove effective, and it is important to select one the dose of which may be gradually decreased. Senna prunes, which were described in Chapter V, fill the purpose very well. Six or eight of them may be needed at first, but the number may be gradually reduced, until finally none are necessary.